I was looking at Hansen & Quinn's 'Greek: An Intensive Course' on Amazon. It seems to come in two volumes, the eight hundred odd page one and an appendix. Unfortunately, there's not a lot of useful information about what is contained in this appendix. Has anyone seen it? Can you tell me what's in it, please?

nothing should arouse more suspicion than a cross-party consensus - Antidemocritus fl. 2010

I have the more recent 1 vol edition, but don't have access to it right now -- if I recall correctly, the appendices are mostly grammar charts and verb tables and such. I believe they include some forms that aren't covered in the main text (such as the dual).You might try checking the archives of classics journals & see if you can find a review of the textbook there, an academic review will usually cover info on content. Or see if there's a preview on google books (I can't seem to access anything, but this varies by country, so...) Or write to the bookseller for a table of contents of the appendix, often they're happy to help with something like that.

Yes, the appendix has grammar similar to what is in the back of the later v2 single volume. I haven't ever had one, but I know people who have worked with it. They say the content of the appendix is similar to what is in the back of v2.